mirror of
https://github.com/OpenHFT/Chronicle-Map.git
synced 2021-09-13 01:26:12 +00:00
43 lines
2.0 KiB
Plaintext
43 lines
2.0 KiB
Plaintext
= Updates included in Chronicle Map 3
|
|
Neil Clifford
|
|
:toc: macro
|
|
:toclevels: 1
|
|
:css-signature: demo
|
|
:toc-placement: macro
|
|
:icons: font
|
|
|
|
toc::[]
|
|
|
|
Changes between Chronicle Map 3 and the previous Chronicle Map version are detailed below:
|
|
|
|
== Functional changes
|
|
|
|
- Chronicle Map 3 has a https://github.com/OpenHFT/Chronicle-Map/blob/doco_refresh/spec[formal data store specification] that specifies the https://github.com/OpenHFT/Chronicle-Map/blob/doco_refresh/spec/1-design-goals.md#guarantees-1[guarantees] that the data store provides, and gives a way to verify those guarantees.
|
|
|
|
- Added support for multi-key queries.
|
|
|
|
- "Listeners" mechanism fully reworked; see <<CM_Tutorial_Behaviour.adoc#,Behaviour Customization>>. This has a number of important consequences, most notable is that it is now possible to define "eventual-consistency" replication strategy, different from "last write wins"; any state-based CRDT.
|
|
|
|
- "Stateless clients" functionality (remote calls) is moved to Chronicle Datagrid.
|
|
|
|
- Replication is performed using Chronicle Datagrid.
|
|
|
|
- Earlier versions of Chronicle Map had hard creation-time limits on the number of entries storable in a Chronicle Map. If the size exceeded this limit, an exception was thrown. +
|
|
In Chronicle Map 3, this limitation is removed. The number of entries still has to be configured when the Chronicle Map is created, Exceeding this configured limit is possible, but discouraged. +
|
|
For more information, see <<CM_Tutorial.adoc#configure-entries,Configure entries>>.
|
|
|
|
- Chronicle Map 3 supports <<CM_Tutorial.adoc#entry-checksums,entry checksums>> that enables detection of data corruption, providing additional safety.
|
|
|
|
- Chronicle Map 3 allows <<CM_Tutorial.adoc#recovery,recovery>> after failures and corruptions.
|
|
|
|
- Minor improvements and fixes.
|
|
|
|
== Non-functional changes
|
|
|
|
- Chronicle Map 3 requires Java version 8, or later.
|
|
|
|
- Chronicle Map 3 has <<CM_Compatibility_and_Versioning.adoc#,versioning and compatibility policies>>.
|
|
|
|
'''
|
|
<<../ReadMe.adoc#,Back to ReadMe>>
|